Detection of Out-Of-Focus Digital Photographs

Lim, Suk Hwan ; Yen, Jonathan ; Wu, Peng

HP Development Company

关键词: digital photographs;    out-of-focus;    sharpness;    image analysis;   

RP-ID  :  HPL-2005-14

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

One of the first criteria that a user uses in deciding to use and consume a photograph is whether it is in focus or not. We have developed an effective and efficient algorithm to detect out-of-focus photographs. In this paper, we describe an algorithm that automatically determines if the captured photograph is out-of-focus through image analysis. It uses several global figure-of-merits which are computed from local image statistics. Experimental results show 90% detection rate with 10% false alarms. 4 Pages